Mechanical movement



(No Model.)

J. W. DODGE.

MECHANICAL MOVEMENT.

Patented May 26, 1885.

k IEP/EIUUK point.

jeetion or J. \VESLEY DODGE, OF MALDEN, MASSACHUbE"T$.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 318,456,

dated May 26, 1885.

A pplieatim tiled A pril 20, 1985. (No model.)

jib ctZZ 2071 0711, it may concern:

Be it known that I, J. XVEsLnY Donors, of Walden, in the county of Middlesex and the State of Massachusetts, have invented certain Improvements in Mechanical Movements, of which the following is a specification.

The invention relates to certain improvements in mechanical movements in which two tools are caused to reciprocate simultaneously in opposite directions, and are for certain purposes improvements on Patent No. 298,671, granted to me May 13, 1884.

The invention consists of a hollow disk scoured to a suitable frame, and formed on its outer edge witlrtwo annular recesses into which areiitted two metal rings, each of which is connected by a rod or pitman with an cecentiic on a drivingshaft, the eccentrics being on opposite sides of the shaft, and when the shaft is rotated it imparts through the pitman to the rings a simultaneously rcciproeating motion in opposite directions. On the lower outward edge of each ring a socket or tool-holderis secured, provided with a springcatch or other device to engage the shank part of the tool and retain it in place when the tool s introduced into the socket or holder, on which is formed a stop to prevent the tool from being pressed upward beyond a certain A. portion of the cover 6, on its lower edge, is cut away to allow the free movement of the tool-holders. As a degree of" elasticity is necessary for burnishing purposes, a prospringholderis secured to the disk above its center, in which is placed one or more springs (in drawings, two independent springs are shown) held on their upper ends by screw-plugs and on their lower ends by slides that fit in the block.

Referring to the accompanying drawings,

Fi 'nrelre aresentsasidcelevation partiall in b l J- section, of mechanical movements constructed according to my invention. Fig. 2 is an end view of the same, also partially in section. Fig. 3 is a side view showing a modification of the tools and tool-holders.

A represents the frame of the machine; B, the driving-shaft, and G the driving-pulley.

To the frame A are secured two hollow disks, 1) 1), formed on their periphery, each with two annular recesses, into each of which I f l l l l l l is fitted a metal ring, 15, formed at its lower end with a tool-holder, E. I prefer to make the disk 1) in four separate parts and bolt them together, as shown in Fig. 1that is, of

a disk, 1, secured to the frame of the ma chine and provided with a lip or flange, 2. around which fits a ring, 3, provided with a central projection, 4, an outer ring or faceplate, 5, and a cap or cover, (3, the whole being secured together by bolts 7. This is a simple and cheap mode of construction.

H is a projection on the upper part of disk D 1, provided with openings in which blocks XXare l'recto slide. l [are screw-plugsthat confine the springs J .l on their upper ends. The slidcblocks X X are formed on their lower ends to connect, by ball-and-socket or other joints,with the upper ends of rods KK, and near the lower ends of these rods shoulders are made, which bear on the inner surface of the .rings 1*] 1*], to prevent their being forced outward too far by the springs. These rods extend through slots in ring 3 and holes in rings 1:] 1 into the tool-holders, and bear upon the ends of the shanks of the tools L L. The point of contact between the rods K K and slides X X being as near the center of the rings E E as practicable, a very slightmove ment results at this point, while the ends of the rods that pass through the rings are free to move with the rings.

It will be seen that as the shaft B is rotated the cranks or eccentrics G G will, through the pitmen F F, impart a reciprocating motion to the rings E E simultaneously in opposite directions.

In use the operator, either with or without the assistance of shoe holding mechanism, presses the surface to be burnished against the face of the tool or tools, and while the reciprocating of the tools produces the required finish the elasticity of the springs J J, through the medium of rods K K, allows the tools L L to readily adjust themselves to the i nequalitics of the surface operated upon.

In the drawings I have shown adouble machine; but single machines may be constructed according to my invention, if desired.

What I claim as my invention is-- 1. The improved mechanical movement embracing the following elements: the disks D D rings E E and tool-holders E E, having a simultaneous reciprocating motion in opposite directions, substantially as set forth, and for the purpose described. 7

In testimony whereof I have signed my name to this specification, in presence of two subscribing witnesses, this 17th day of April, 1885.

J. \VESLEY DODGE.

Vitnesses:

Y L. MoLLnR,

G. lvh'imnn. 

